If the customer’s site is particularly large or the building is heavily shielded, a signal booster is required. The signal booster can increase the distance between the pager and the receiving host. The signal booster wirelessly receives the information from the pager, and at the same time increases the power to send it to the receiving host, without wiring, just connect to the 220V power supply. The signal booster can be cascaded, so theoretically the distance between the pager and the receiving host can be extended indefinitely. The transmit power of the signal booster is larger than that of the pager, and the coverage area is larger than that of the pager in the same environment, so the distance of the pager is more than doubled, but the actual operation is that the two signal coverage must overlap. To maximize the effectiveness of the signal booster, first determine its best position. The method to determine the best position of the signal booster is to press the pager continuously in the room farthest from the receiving host, and gradually move the signal booster away from the pager until the signal booster cannot receive the signal from the pager (signal The green light on the booster does not light up), and then back 2-5 steps in the direction of the pager. This position is the best position for the signal booster.